4 inch
8×20 Concrete Slab (4 inches): Yards, Feet & Bags
Light-duty slab estimate, typical for patios, walkways, and shed pads.
Concrete Slab Size Pages (4″ & 6″)
Browse ready-made slab size pages for common 4-inch and 6-inch pours. Compare sizes, review volume and bag estimates, and use the calculator only when your dimensions need custom changes.
Need Custom Dimensions?
Open a calculator when your slab size, thickness, or waste allowance does not match a ready-made page.
Open Slab Calculator → Bag Calculator → All Project Pages →What You Can Find Here
Use this hub to browse common slab sizes, compare 4-inch and 6-inch thickness, and open ready-made pages that estimate cubic yards, cubic feet, and bag counts. It is designed for fast planning when you want a size-based answer without starting from scratch.
If you already know the slab size, open the closest matching page. If your job has custom dimensions, unusual thickness, or a different waste allowance, use the slab calculator instead. The goal of this hub is to help you reach the right slab page quickly.
Best Way to Use the Hub
- Choose 4 inch or 6 inch thickness before comparing slab sizes.
- Use search when you already know a size like 12x20 or 14x24.
- Open a slab page when you want a fast estimate for a common size.
- Open the calculator when your slab dimensions are custom or irregular.
Popular slab sizes
Select a common size to filter the slab pages instantly.
All Slab Size Pages
100 results
6 inch
8×20 Concrete Slab (6 inches): Yards, Feet & Bags
Thicker slab estimate, suited for driveways, garages, and heavier loads.
4 inch
8×8 Concrete Slab (4 inches): Yards, Feet & Bags
Light-duty slab estimate, typical for patios, walkways, and shed pads.
6 inch
8×8 Concrete Slab (6 inches): Yards, Feet & Bags
Thicker slab estimate, suited for driveways, garages, and heavier loads.
Slab Size Pages FAQ
Should I use the 4-inch or 6-inch slab filter?
Use the 4-inch filter for lighter residential slabs such as patios or walkways, and the 6-inch filter when you need thicker slabs for heavier loads or more demanding use cases. Always confirm the final slab design for your project conditions.
What is the difference between a slab size page and the slab calculator?
A slab size page gives you a fast estimate for a common size, while the slab calculator is better when your dimensions, thickness, or waste allowance are custom.
Are the bag counts and cubic yards exact?
No. They are planning estimates. Final material needs can change with site conditions, over-excavation, waste, and the yield printed on the product you buy.
Do these slab pages include a waste allowance?
They are meant for planning, but the right waste allowance depends on the pour, formwork, and jobsite conditions. It is still smart to review the final number before ordering concrete.
Can I use these slab pages for patios, driveways, and shed slabs?
Yes. They work well as quick planning pages for common slab projects such as patios, walkways, driveways, pads, and shed bases, as long as you confirm the final thickness and reinforcement needs for the job.